Centerline-Tool

thingiverse

This tool helps to find the center of cylindrical objects. Imagine you cut a broomstick and want to drill a hole lengthwise, in center. Place the tool on the end, so that the two sides touch the circumfere. The slide a pencil along the slot. Rotate the tool by some amount (ca 90° will do fine) Slide the pencil along the slot again. Remove the tool. Where the two lines intersect is your center. Best printed upside down. No support needed.